We can’t know if Donald Trump has dementia. Even if he did, it wouldn’t excuse his actions
- Written by Joyce Siette, Associate Professor | Deputy Director, The MARCS Institute for Brain, Behaviour and Development, Western Sydney University
Over recent weeks, speculation has grown about US President Donald Trump’s erratic behaviour during the US-Israel war on Iran.
While questioning Trump’s mental fitness for office, various commentators have suggested he has malignant narcissism, Alzheimer’s disease or frontotemporal dementia, and is experiencing accelerating cogniti...





